硒催化CO/H_2O选择性还原间二硝基苯制间硝基苯胺  

Selenium-Catalyzed Reduction of m-Dinitrobenzene to m-Nitroaniline by Carbon Monoxide and Water

作　　者：刘晓智[1,2] 陆世维[3] 

机构地区：[1]辽宁大学稀散元素化学研究所 [2]中国科学院大连化学物理研究所国家催化工程技术研究中心,辽宁大连116023 [3]中国科学院大连化学物理研究所国家催化工程技术研究中心

出　　处：《催化学报》2005年第1期74-78,共5页

摘　　要：采用硒作催化剂 ,乙酸钠为助催化剂 ,用CO/H2 O对间二硝基苯进行部分还原制备了间硝基苯胺 .考察了时间、CO压力、温度、催化剂用量、溶剂和水量等因素对反应的影响 .以四氢呋喃作溶剂 ,使用摩尔量为间二硝基苯 2 0倍的水和 4 %的硒 ,在 16 0℃和CO压力 1MPa下反应 3h ,间二硝基苯转化率可达 10 0 % ,间硝基苯胺的选择性和收率均为 95 7% .Applying CO/H2O reaction as a hydrogen source for the reduction of aromatic nitro compounds to corresponding amines is of great potential from a technological point of view, especially when a cheap catalytic system can be employed. Selenium- catalyzed reduction of m-dinitrobenzene (DNB) to m-nitroaniline (NAL) by CO/H2O with NaOAc as a co-catalyst was studied. The effects of time, carbon monoxide pressure, temperature, selenium/nitrobenzene mole ratio, solvent amount and water amount on the DNB conversion I NAL selectivity and NAL yield were investigated. When the reaction proceeded at theta= 160 degreesC and p (CO) =1 MPa for 3 h, using THF as a solvent, with n (H2O) /n (DNB) = 20 and n (Se) /n (DNB) = 0. 04, the DNB conversion was up to 100% with NAL selectivity and NAL yield of 95.7%.

关 键 词：硒 还原 间二硝基苯 间硝基苯胺 一氧化碳 水 

分 类 号：TQ246[化学工程—有机化工]